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Old 07-08-2007, 11:33 AM   #11
gt90stang
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Cougar5.0,

Do you have a pic of the tuner tube either in the MAF or out doesn't matter. I tried to check it out on the C&L website and the pic they show has it picking up air near the edge of the MAF tube (same place as my green tube does)?

My car runs pretty good now with the original 76mm C&L with green tube. I'm running the stock airbox and plumbing with a K&N and the silencer removed. The Blowzilla uses the MAF as a draw through, I only get a few small wiggles in the RPM, MAF and MPH curves on WOT acceleration. I think due to noise in the MAF signal from the C&L, but nothing major. AFRs, spark and boost look good.

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Old 07-08-2007, 11:51 AM   #12
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If you are using the TwEECer to log, the wiggles in the plots are more than likely due to sampling errors - the TwEECer just misses points or grabs a noisy one or duplicates instead. I have logged the C&L MAF & other parameters using my LM-1 which logs the voltage directly and the curves are smooth and consistent.

With the tuner tube, when I say it samples closer to the middle, I am describing the bend down at the back of the sample tube where is "draws" air in from near the middle of the meter. This "venturi" type pickup makes it more immune to back pulses and it compensates for pressure differentials between the middle and outer perimeter of the meter - making it more immune to irregularities in airflow caused by bends etc in the intake piping.

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Old 07-08-2007, 05:27 PM   #13
gt90stang
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Cougar5.0,

Cool, Thanks

So can I just buy a Tuner tube for my 76mm and put in the new transfer function? That would be cool and lower cost, I don't think I need a bigger MAF due to my Blowzilla with standard input plenum and 70mm TB.

Near the 1st gear shift I can feel it pull back a little and it shows up on the datalogs also. Maybe it is the AOD shifting...1st goes pretty quick!

GT90Stang, Don
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Old 07-08-2007, 09:11 PM   #14
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Quote:
Originally Posted by gt90stang View Post
Cougar5.0,

Cool, Thanks

So can I just buy a Tuner tube for my 76mm and put in the new transfer function? That would be cool and lower cost, I don't think I need a bigger MAF due to my Blowzilla with standard input plenum and 70mm TB.

Near the 1st gear shift I can feel it pull back a little and it shows up on the datalogs also. Maybe it is the AOD shifting...1st goes pretty quick!

GT90Stang, Don

I bought the Tuner Tube for my 80mm and input the new curve. I was pegging the other tubes and just wanted to run more in the linear range of the meter. I have had pullback in 1st due to running into the rev-limiter, blowing out spark, uncovering the sock in the gas tank & pegging the MAF! Everything does happen fast & it's not always easy to figure out what is causing the pullback since the TwEECer misses a lot of data up top.
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Old 07-09-2007, 02:25 PM   #15
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I have to agree with Cougar50. I used the C&L 73 with the tuner tube and a set of 42s. It made a hugh difference. I have a picture of it if you would like to see it Send me an email.

I will never use another C&L without the tuner tube. I was able to use the straight tubes but once I saw the difference the tuner tube made I was convienced the straight tubes were not as good.
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Old 07-09-2007, 03:01 PM   #16
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Quote:
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I have to agree with Cougar50. I used the C&L 73 with the tuner tube and a set of 42s. It made a hugh difference. I have a picture of it if you would like to see it Send me an email.

I will never use another C&L without the tuner tube. I was able to use the straight tubes but once I saw the difference the tuner tube made I was convienced the straight tubes were not as good.
hmm. to bad they didn't have these tuner tubes a couple of years ago
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Old 07-09-2007, 03:04 PM   #17
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hmm. to bad they didn't have these tuner tubes a couple of years ago
I think they did, they just were not advertised. I have had mine about a year and a half. I only found out because when I called I was able to talk directley to Lee.
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Old 07-09-2007, 03:33 PM   #18
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I think they did, they just were not advertised.
Bad marketing mistake on their part. Their crappy meters with the straight tube design left a bad taste in my mouth after I work with it for over a year trying to give them the benefit of the doubt. I have since gone with a PMAS meter and had excellent results and now I advise poeple to steer clear of C&L.
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Old 07-10-2007, 10:49 AM   #19
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Yep, even though I had no major issues with all the combinations of straight-tubes that I used previously, I was immediately impressed with the lower voltage noise after switching to the Tuner Tube. This is most noticable when I am lugging up a hill in 5th gear at 1100 RPM or so on the back roads around here. I hadn't previously thought this was possible with a slightly lopey cam that wants to idle at ~800 RPM. That and the fact that it can flow to over 3000 kg/hr using the 85 mm tube and it's an all-round winner for me.
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